A virtual network comprising virtual machines executing at a computing environment is implemented. A software defined networking (SDN) appliance is configured to provide a connection to computing resources via a virtual network of a virtual computing environment. The SDN appliance is configured to apply policies of the virtual computing environment to data traffic on the virtual network. The SDN appliance is operable to interact with multiple network devices that are configured to act as a hardware acceleration device for processing data traffic. Virtual addresses are assigned to the network devices. The SDN appliance executes a virtual switch configured to identify data traffic sent to or received from a host and act as a proxy for the network devices and respond on their behalf.